Hp number idea on new car

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junior636

junior636

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I hate to be that guy but I'm picking up a dart this weekend and I'm just wondering what you guys think the hp range would be on the set up it has currently.

440 stock stroke
10:1 compression
93 pump gas
Edelbrock rpm heads un-ported
Edelbrock victor single plane
Hughes whiplash cam-.518 lift ex and int, 107 seperation, hydryualic flat tappet
Quickfuel 750 carb
Tti 2" headers
3" exhuast

Those are the details i know. I'd eventually like to have the heads ported, maybe a different cam? And probably get a custom built pro systems carb.
 
Sounds like a friends build. 485 hp 500 lb.ft
 
I will say around 450 HP and 475 tq. That 2" header is pretty big for what you have now, a 1-3/4 to 1-7/8 would of been better. I had a 2" header on a 468 BBC that made 700 hp on the motor and 1006 hp on Nitrous.
 
Yeah but he was ordering headers for it anyway and I'd like to do some upgrades and get it up to about 600hp so i might as well have him get the good ones now. It currently has 1 3/4" on it. He just ordered me 2" tti's.
 
To get 600 hp you will need around 11.0-1 compression with a 440 a big solid lifter cam .585/.600 lift and a set of Trick flow 270 heads.
 
I have rpm performer heads on my 426 low deck, 383 block with a 440 crank. They only have a 220 cc runner. I made 525 hp and 552 tq. better off buying a better head right off the get go.
 
IMO 500 is askin a LOT for unported heads. That said, you can still make a lot of power.
 
junior636 said:
600hp isn't attainable with ported edelbrock heads?
Click to expand...
Well actually, naturally aspirated with 91 octane, we never made more than 787 horsepower on a 451 stroker with ported RPM heads. However, these were not your average ported Edelbrock RPM heads.

This is during a dyno contest on Comp Cams dyno when it was only making 723 HP. There are some pictures of the engine on the web page.

2009 Amsoil/Mopar Muscle Engine Challenge LaRoy Engines & ProMax Performance - Mopar Muscle Magazine

The next closest 451 engine was making about 585 HP, and a 500 beat us by 1 horsepower.
 
junior636 said:
I hate to be that guy but I'm picking up a dart this weekend and I'm just wondering what you guys think the hp range would be on the set up it has currently.

440 stock stroke
10:1 compression
93 pump gas
Edelbrock rpm heads un-ported
Edelbrock victor single plane
Hughes whiplash cam-.518 lift ex and int, 107 seperation, hydryualic flat tappet
Quickfuel 750 carb
Tti 2" headers
3" exhuast

Those are the details i know. I'd eventually like to have the heads ported, maybe a different cam? And probably get a custom built pro systems carb.
Click to expand...
I would say 500HP at 520 ft torque.
 
My previous 440 had a .509 cam with about 10.5:1 compression and was somewhere in the ballpark of around 500-525hp. So I think the estimates from 450-500 sound reasonable.
 
Ok so I've kind of got this car going, seems to be a new issue every time i drive it though. Anyway, it's not really as fast as i had hoped......

What would be my next best bang for the buck? Trick flow 240 heads and a different cam? I'd like to be more like 600+ hp. Is that possible from the 440 or will i need a stroker kit?

20190705_133623.jpg
 
Fisher said:
To get 600 hp you will need around 11.0-1 compression with a 440 a big solid lifter cam .585/.600 lift and a set of Trick flow 270 heads.
Click to expand...


Aren`t the 270 heads max wedge port ?? 240`s will do it !
 
junior636 said:
600hp isn't attainable with ported edelbrock heads?
Click to expand...

This set up was run by a mate in his Dart@SPR>

440, 12.7:1, DC. .590 sft cam, 272@.050, MCH ported Eddies (322cfm), Victor int. 2" hdrs, 1050 Dom..track hp was 601fwhp as per weight/mph showed....thats real hp not dyno stuff.

600+hp from a 440 with TF240's@10:1 is going to be tuff even with a big cam as in .630" range, 240's flow 323@600. Go 512ci with 270's and a .620" and 650hp can be done much easier and @10:1.
 
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What pistons and rods are in the current short block?

600hp from a stock stroke 440 isn’t that hard, but it’s not really a “slap something together” deal either.

Porting your current heads wil get you there.
You’d have to weigh that cost wise vs selling those heads and just buying some TF 240’s.
You’ll want a better bottom end than ly rods and TRW L2355’s.

Imo, instead of getting hung up on HP numbers, a better approach would be to come up with an ET goal.

As an example........With a set of 300cfm RPM heads I made 650hp from a stock stroke 440 with a flat tappet cam....... but it was a high CR bracket race motor.
10.0’s @3470lbs.

Knock a couple points of compression out of it, use a little smaller cam........ it would be in that 600hp range.

If a stroker and new heads are in the budget(just sell your current motor complete)........ then the same level of effort build as a 600hp street/strip 440, but applied to something like a 505, will put you in the 650-700hp range pretty easily.
 
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PRH said:
What pistons and rods are in the current short block?

600hp from a stock stroke 440 isn’t that hard, but it’s not really a “slap something together” deal either.

Porting your current heads wil get you there.
You’d have to weigh that cost wise vs selling those heads and just buying some TF 240’s.
You’ll want a better bottom end than ly rods and TRW L2355’s.

Imo, instead of getting hung up on HP numbers, a better approach would be to come up with an ET goal.

As an example........With a set of 300cfm RPM heads I made 650hp from a stock stroke 440 with a flat tappet cam....... but it was a high CR bracket race motor.
10.0’s @3470lbs.

Knock a couple points of compression out of it, use a little smaller cam........ it would be in that 600hp range.

If a stroker and new heads are in the budget(just sell your current motor complete)........ then the same level of effort build as a 600hp street/strip 440, but applied to something like a 505, will put you in the 650-700hp range pretty easily.
Click to expand...

Im not sure what crank and rods, i know it has hypertectic pistons in it. I don't even know when I'll get to the track with it but I'd at least like it to scare me a little. That my goal lol.

How superior are the cnc ported 240 trick flows vs a ported rpm head?
 
That’s a pretty abstract goal.
When it’s not clearly defined what you’re shooting for it’s harder to formulate a plan.

I would say in the 525-600hp range the difference between ported RPM heads vs TF240’s wouldn’t be huge and it would increase as the power level went up.

I use Hyper pistons in 440’s for street/strip stuff up to about 500hp.

Whether you realize it or not, what you really want is a stroker.
That will give you the seat of the pants feel you’re looking for.

Pump gas 505 with the RPM heads ported.
The right combo will put it in the 640-650tq range, and around 600hp and still be reasonably docile and low maintenance.

If you go about it in any “lesser” way, you’ll be wishing you’d done the 505 sooner than you think.

However, you’re at the point right now where you need to decide how much $$$ you’re willing to spend on it.
Ultimately, that usually dictates the direction of the build.
 
PRH said:
That’s a pretty abstract goal.
When it’s not clearly defined what you’re shooting for it’s harder to formulate a plan.

I would say in the 525-600hp range the difference between ported RPM heads vs TF240’s wouldn’t be huge and it would increase as the power level went up.

I use Hyper pistons in 440’s for street/strip stuff up to about 500hp.

Whether you realize it or not, what you really want is a stroker.
That will give you the seat of the pants feel you’re looking for.

Pump gas 505 with the RPM heads ported.
The right combo will put it in the 640-650tq range, and around 600hp and still be reasonably docile and low maintenance.

If you go about it in any “lesser” way, you’ll be wishing you’d done the 505 sooner than you think.

However, you’re at the point right now where you need to decide how much $$$ you’re willing to spend on it.
Ultimately, that usually dictates the direction of the build.
Click to expand...

If , ur going to buy alum. heads , go with the trickflows !! Everything I`ve read , they have been good out of the box, edelbrocks , not so much !!
 
As stated in the first post, he already has RPM heads....... which is why he’s weighing the differences between ported RPM’s vs TF240’s.
 
PRH said:
As stated in the first post, he already has RPM heads....... which is why he’s weighing the differences between ported RPM’s vs TF240’s.
Click to expand...

This!

I'd like to be in the 10's and still cruise the streets. Im just getting this car going so i haven't been to the track yet.
 
My advice is, get it on the track as it is, so you have a better handle on the gap that needs to be bridged.

There's more to running 10’s than just adding power.
 
PRH said:
My advice is, get it on the track as it is, so you have a better handle on the gap that needs to be bridged.

There's more to running 10’s than just adding power.
Click to expand...

I understand that. It's got a 4 link rear with 325 radials and a dana 60 with 4:10s. Should easily have the chassis to go 10s.
 
you have the chassis tied together and driveshaft loop
you have ok heads so most bang for your buck would be stroker
and go light on the pistons
think about chevy pin rods for lighter weight and block clerance
 
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